78414631 has 2 divisors, whose sum is σ = 78414632. Its totient is φ = 78414630.

The previous prime is 78414587. The next prime is 78414641. The reversal of 78414631 is 13641487.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78414631 - 2¹³ = 78406439 is a prime.

It is a super-2 number, since 2×78414631² = 12297708709732322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78414641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39207315 + 39207316.

It is an arithmetic number, because the mean of its divisors is an integer number (39207316).

Almost surely, 2^78414631 is an apocalyptic number.

78414631 is a deficient number, since it is larger than the sum of its proper divisors (1).

78414631 is an equidigital number, since it uses as much as digits as its factorization.

78414631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 78414631 is about 8855.2036114366. The cubic root of 78414631 is about 428.0216146973.

The spelling of 78414631 in words is "seventy-eight million, four hundred fourteen thousand, six hundred thirty-one".